1 files changed, 2 insertions, 2 deletions

diff --git a/ssh-pkcs11-client.c b/ssh-pkcs11-client.c
index 0544b0e86..028b272cb 100644
--- a/ssh-pkcs11-client.c
+++ b/ssh-pkcs11-client.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-pkcs11-client.c,v 1.9 2018/07/09 20:39:28 markus Exp $ */
+/* $OpenBSD: ssh-pkcs11-client.c,v 1.10 2018/07/09 21:59:10 markus Exp $ */
 /*
  * Copyright (c) 2010 Markus Friedl.  All rights reserved.
  *
@@ -57,7 +57,7 @@ send_msg(struct sshbuf *m)
 
         POKE_U32(buf, mlen);
         if (atomicio(vwrite, fd, buf, 4) != 4 ||
-            atomicio(vwrite, fd, (u_char *)sshbuf_ptr(m),
+            atomicio(vwrite, fd, sshbuf_mutable_ptr(m),
             sshbuf_len(m)) != sshbuf_len(m))
                 error("write to helper failed");
         if ((r = sshbuf_consume(m, mlen)) != 0)